以编程方式连接到蓝牙棒code在Android的扫描仪 [英] Programmatically connecting to a Bluetooth enabled barcode scanner in Android

问题描述

我的工作创造一个Android应用程序，连接到蓝牙吧code扫描仪。我一直在寻找如何做到这一点code的例子，但我找不到任何处理连接的设备。我看到很多连接的对等与Android设备，但是这似乎并没有覆盖到的Andr​​oid设备。

这是在code我有这么远。它没有在调用一个连接被拒绝连接。

  UUID UUID = UUID.fromString（00001101-0000-1000-8000-00805F9B34FB）;
插座= mDevice.createRfcommSocketToServiceRecord（UUID）;
Socket.connect（）的;

06-11 15：29：10.113：W / System.err的（20018）：java.io.IOException异常：连接被拒绝
06-11 15：29：10.133：W / System.err的（20018）：在android.bluetooth.BluetoothSocket.connectNative（本机方法）
06-11 15：29：10.133：W / System.err的（20018）：在android.bluetooth.BluetoothSocket.connect（BluetoothSocket.java:212）
 

该装置是搭配了Android手机，我用这个从电话上。

 设置＆LT; BluetoothDevice类＆GT; pairedDevices = btAdapter.getBondedDevices（）;
 

解决方案

createInsecureRfcommSocketToServiceRecord 是一个很大的提示。

我必须连接到蓝兆WT32-A蓝牙模块的问题。 我的老code是根据被拒绝蓝牙聊天的例子（其中正常工作与BTM 222蓝牙模块），并使用 createRfcommSocketToServiceRecord ，与连接的结果是：

  java.io.IOException异常：连接被拒绝
 

古怪，试图通过 createRfcommSocketToServiceRecord 连接连连，在很短的间隔，也有时工作。

另外需要注意：使用 createInsecureRfcommSocketToServiceRecord 的需要API级别10

。

I am working to create an Android App that connects to a bluetooth barcode scanner. I've been looking for code examples of how to do this but I can not find any dealing with connecting to a device. I see lots for connecting peer-to-peer with android devices but that doesn't seem to cover android to device.

This is the code I have so far. It fails on the call to connect with a Connection refused.

UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
socket = mDevice.createRfcommSocketToServiceRecord(uuid);
socket.connect();

06-11 15:29:10.113: W/System.err(20018): java.io.IOException: Connection refused
06-11 15:29:10.133: W/System.err(20018):    at  android.bluetooth.BluetoothSocket.connectNative(Native Method)
06-11 15:29:10.133: W/System.err(20018):    at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:212)

The device is paired with the android phone and I retrieve it from the phone using this.

Set<BluetoothDevice> pairedDevices = btAdapter.getBondedDevices();

解决方案

createInsecureRfcommSocketToServiceRecord was a great hint.

I had problems connecting to a Bluegiga WT32-A Bluetooth module. My old code was based on Bluetooth Chat example (which worked fine with an BTM 222 Bluetooth module) and used createRfcommSocketToServiceRecord, with the result of the connection being refused:

java.io.IOException: Connection refused

Weirdly, trying to connect by createRfcommSocketToServiceRecord again and again, in short intervals, did sometimes work.

Another thing to note: The use of createInsecureRfcommSocketToServiceRecord requires API level 10.

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